Struck with System command

[pavi]

Hi,
I am using system command to execute a shell script in a C
program.
Usage system("sh file").
There are situations where the file may be empty. But
execution gets hung if the
file is empty. What might be the problem.

Regards,
Praveen Kumar A.S

 

[Bart van Ingen Schenau]

Hi,
I am using system command to execute a shell script in a C
program.
Usage system("sh file").
There are situations where the file may be empty. But
execution gets hung if the
file is empty. What might be the problem.

Regards,
Praveen Kumar A.S

Unfortunately, we can't tell whats wrong.
The interpretation of the argument to the system() function is very
system-dependent.
It is the intention that the string is passed to the command-interpreter
of the OS, as if the string were typed that way on the command prompt.
To figure out what is happening, you could try to manually give the
command you try to execute with system() and see what happens.

<OT>
It is possible that the sh shell keeps waiting for interactive input.
</OT>

Bart v Ingen Schenau

 

[Joe Wright]

Hi,
I am using system command to execute a shell script in a C
program.
Usage system("sh file").
There are situations where the file may be empty. But
execution gets hung if the
file is empty. What might be the problem.

Regards,
Praveen Kumar A.S

Really hard to say. You do know that file is the name of a command on
Unix and Linux systems. Not sure what it does if run with no arguments.

 

[Guru Jois]

Hi,
I am using system command to execute a shell script in a C
program.
Usage system("sh file").
There are situations where the file may be empty. But
execution gets hung if the
file is empty. What might be the problem.

Regards,
Praveen Kumar A.S

Are you sure that the command interpreter in you system is 'sh'?
If it is, it is unlikely the command hungs unless the script is made
so.